• Title/Summary/Keyword: conceptual model

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Research on a Conceptual Model of Architecture Framework for Power Plant Operations & Maintenance(Q&M) (발전 플랜트 O&M을 위한 아키텍처 프레임워크 개념모델에 관한 연구)

  • Lim, Yong Taek
    • Journal of the Korean Society of Systems Engineering
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    • v.14 no.1
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    • pp.83-88
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    • 2018
  • Engineering is a sector with more than three times the industrial effectiveness of manufacturing. In the domestic engineering life cycle, the Operations & Maintenance (O&M) phase is a relatively high level of technology. Based on accumulated knowledge of O&M phase, it is necessary to advance operating technology and expand overseas O&M market expenditure. This study is the early stage of knowledge-based power plant O&M service framework reference model. In this study, we propose a conceptual model of architecture framework for power plant O&M. We survey the architecture framework and reference model and propose conceptual model of architecture framework for power plant O&M. The conceptual model of architecture framework for power plant O&M consists of stakeholder, O&M scenario, O&M technology. In particular, the O&M technology is defined as the fourth industrial revolution intelligence information technology. We defined a meta model from the conceptual model to define the power plant O&M architecture framework. In the future, we intend to development an architecture framework from the conceptual model and meta model.

Effect of Science Conceptual Model Completion Activity and Science Conceptual Model Modifying Activity on Middle-school Students' Achievement in Science Conceptual Learning (미완성 개념 모형의 완성 활동 및 주어진 개념 모형의 수정 활동이 중학생의 과학 개념 학습 성취도에 미치는 효과)

  • Kim, Jung-Kuk;Kim, Won-Sook;Kim, Young-Min
    • Journal of The Korean Association For Science Education
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    • v.29 no.1
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    • pp.1-9
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    • 2009
  • The purposes of this study are to investigate the effects of the Science Conceptual Model Completion Activity and Science Conceptual Model Modifying Activity on middle-school students' achievement in science conceptual learning, and to analyze if there are any correlations among their achievements by purposed activities, their cognitive level and school science achievement. For the study, 112 middle school students were sampled for three groups, which are two experimental groups (Model Completion activity group, Model Modifying Activity group) and one control group. Pre- and post-tests were taken to measure the students' achievement in science concepts, and the logical thinking ability test was administered after the implementation period. In addition, their school science achievements were analyzed. The research findings are as follows: First, the Science Conceptual Model Completion activity is more effective for middle school students' science conceptual learning than the Science Conceptual Model Modifying activity or conventional activity. Second, higher school science achievement also results in higher achievement of science concepts through the Conceptual Model Modifying activity or the Conceptual Model Completion activity. Lastly, the Conceptual Model Completion activity is more effective for the concrete operational level students to attain science concepts than formal operational level ones. Meanwhile, on the contrary, the Conceptual Model Modifying activity is more effective for formal operational level students than the concrete operational level ones.

Ontology-based Conceptual Model Building Framework for Discrete Event Simulation (온톨로지를 이용한 이산 사건 시뮬레이션의 개념적 모델 구축 지원에 관한 연구)

  • Park, Jisung;Jeong, Sunghwan;Sohn, Mye
    • Korean Journal of Computational Design and Engineering
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    • v.19 no.1
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    • pp.29-40
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    • 2014
  • Conceptual Modeling is the process of abstracting a model from a real or proposed system. It is probably the most important aspect of a simulation study. Relate works show that the elementary developers devoted little time to understanding how the systems actually worked, namely they didn't build appropriate conceptual model. Thus, the result of simulation is inconsistent because it depends on developer's competence. Although many researchers suggested various techniques enabling developer to build conceptual model, there were several limitations. In this study, to overcome the limitations of existing techniques, we proposed COMBINE-DES (COnceptual Model BuildINg framEwork using ontology for Discrete Event Simulation). The COM-BINE-DES supports expediting the conceptual modeling with Solution ontology generated by Domain ontology and Simulation ontology. Moreover, it provides consistent simulation result regardless of repeated modeling.

산악지역 내 LNAPL 오염의 개념모델 정립을 위한 사례연구

  • Kang, U-Jae;Gong, Jun;Jeon, Jin-Oh;Lee, Sang-Bong;Hwang, Jong-Sik;Bae, U-Geun
    • Proceedings of the Korean Society of Soil and Groundwater Environment Conference
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    • pp.85-88
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    • 2001
  • Since mountainous area has access restrictions for field work, assessors need to establish a conceptual model of the contamination prior to the field investigation. In this study we established a conceptual model of the contamination based on site inspection and geological survey, followed by the field investigation for the petroleum spill site. In the conceptual model, we estimated that tile contamination should have spread by groundwater and topographical characteristics within the top soil layer. The spread of contamination through rock was not considered in the conceptual model due to impermeable characteristics of metasyenite. The contaminated environmental media of the petroleum spill site include soil and groundwater. According to the analysis result of the contamination, the volume of contaminated soil is estimated approximately 4, 150 cubic meters (7, 055 ton) with most contaminants existing along the groundwater flow within top soil layer.

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Social Transformation of Students' Conceptual Model in an RME-based Differential Equations Course: An Analysis of Students' Use of Conceptual Metaphor (RME 기반 수학 교실에서의 개념적 모델의 사회적 변환: 미분방정식에 대한 개념적 은유 사용 패턴 분석)

  • 주미경;권오남
    • Journal of Educational Research in Mathematics
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    • v.14 no.3
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    • pp.221-237
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    • 2004
  • This research analyzed mathematical discourse of the students in an RME-based differential equations course at a university in order to investigate the social transformation of the students' conceptual model of differential equations. The analysis focused on the change in the students' use of conceptual metaphor for differential equations and pedagogical factors promoting the change. The analysis shows that discrete and quantitative conceptual model was prevalent in the beginning of the semester However, continuous and qualitative conceptual model emerged through the negotiation of mathematical meaning based on the inquiry of context problems. The participation in the project class has a positive impact on the extension of the students' conceptual model of differential equations and increases the fluency of the students' problem solving in differential equations. Moreover, this paper provides a discussion to identify the pedagogical factors Involved with the transformation of the students' conceptual model. The discussion highlights the sociocultural aspect of teaching and learning of mathematics and provides implications to improve teaching of mathematics in school.

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A Conceptual Model for the Performance Analysis Simulator of a Weapon Launching System (무장발사장치 체계성능분석을 위한 시뮬레이터 개념 모델링 사례)

  • Yoon, Jae-Moon
    • Journal of the Korea Institute of Military Science and Technology
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    • v.12 no.4
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    • pp.407-414
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    • 2009
  • This paper describes a conceptual model for the performance analysis simulator of a weapon launching system. The system performance analysis simulator is envisioned to provide an integrated analysis environment in which the system performance and operational effectiveness can be analyzed in more rapid and efficient way. The conceptual model for the simulator describes a referent independently of specific technology and implementation, and it can be used to transform the simulator requirements into the simulator system specifications.

Flood Runoff Simulation Model by Using API (선행강우지수를 고려한 홍수유출 시뮬레이션 모형)

  • Heo, Chang-Hwan;Im, Gi-Seok;An, Gyeong-Su;Ji, Hong-Gi
    • Journal of Korea Water Resources Association
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    • v.35 no.3
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    • pp.331-344
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    • 2002
  • This study is aimed at the development of a deterministic runoff model which can be used for flood runoff. The model is formulated by the watershed runoff model. Based on the assumptions that runoff system is nonlinear, the proposed watershed runoff model is the conceptual model. In the model structure, the conceptual model divides the runoff system into a surface structure and a subsurface structure corresponding to the surface flow, and inter flow and ground water flow respectively. The lag time effect of surface can be represented by the sub-tank of surface structure in the conceptual model. The parameter calibration of inter flow and ground water flow in the subsurface structure of the conceptual model is performed by separating the components with numeric filter The runoff coefficient($\alpha$$_2$) is expressed as the function of antecedent precipitation index(API). The parameters with the surface flow can be calibrated with the runoff coefficient($\alpha$$_1$ and $\alpha$/$_{11}$) in the conceptual model. In the conceptual model, an algorithm is developed to calibrate the parameters automatically based on efficiency criteria. The comparative study shows that simulated value from the conceptual model well agreed to observed value.

Theoretical Foundations and a Conceptual Model of Therapeutic Readers' Advisory Services (치료적 독자상담의 이론적 근거와 개념적 모형에 관한 연구)

  • Lee, Kee-Myung;Lee, Jae-Whoan
    • Journal of Korean Library and Information Science Society
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    • v.43 no.1
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    • pp.53-72
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    • 2012
  • The purposes of this research are to search and analyze information theories which are useful to approach bibliotherapy in terms of 'therapeutic' readers' advisory service, and to propose a conceptual model of 'therapeutic' readers' advisory service on the basis of such theoretical foundations. To the end, Dervin's sense-making theory and Kuhlthau's ISP model are introduced and applied to the conceptual model. The conceptual model is profoundly based on Dervin's situation-gap-use metaphor and Kuhlthau's Uncertainty Principle.